herdman



(No Model.) 2 Sheets-Sheet 1.

F. EQHBRDMAN. vBLEVATOR.

No. 506,911. Patented 001:. 17, 1893.

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AM @4401/ l P. E. HBRDM'AN.

2 Sheets-Sheet 2.

ELEVATOBn (No Model.)

Patented Oct. 17, 1893.

' UNITED STATES PATENT OFFICE.

FRANK E. HERDMAN, OF INDIANAPOLIS, INDIANA.

ELEvAToR.

SPECIFICATION forming part of Letters Patent No. 506,911, dated October 1'7, 1893.

Appunti@ sied october 2o, 1892.

To all whom it may concern.-

Be it known that I, FRANK E. HEEDMAN, aV citizen ofthe United States, residingat Indianapolis, county of Marion, and State of Indiana, have invented a new and useful Improvement in Elevators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention has for its object certain improved mechanism for automatically stopping the elevator atany desired point, and Vis adapted for use with any elevator using lifting cables and a drum upon which said cables are wound and from which they arel wound.

I will describe myimprovementin use with an elevator the power foroperating .which is an electric motor; but, as will vreadily be seen, after my improvement has been fully described, it can be used with an elevator the power for operating which. is hydraulic or steam.

In the drawings: Figure 1 is a side elevation of elevating mechanism. Fig. 2 is a plan view of same. Fig. 3 is an enlarged side elevation of a portion of the gear wheel B, and Fig. 4 is a section on the line -x, Fig. 3.

M is the motor, the shaft m of which operates the worm m', which gears with the worm wheel m2 on the drum shaft a. Upon this shaft ais the winding or cable drum A. To the end of the drum shaft ct is secured a pinion B, in which meshes the gear B'. These two gears B and B' are constructed so as to be in a certain relation to each other; that is, in the full travel of the elevator car the gear B' makes but one revolution, or less than one revolution, or not enough over one revolution to allow the same pin D to come in contact with the lever H more than once during the full travel of the car, as will hereinafter be fully described. Instead of reducing the revolutions of the gears directly from the gearB to the gear B', compound gears may be used and still gear B have but one revolution in the full travel of the elevator. The inner edge of the rim of the gear wheel B' is provided with a slot b extending around the entire circumference (see Fig. 3).

C is a bolt, the head c of which is adapted to be inserted in. said slot, the bolt itself pass- Serial No. 449,524. (No model.)

ing through a forging Dhaving a pin d in its outer end. The pin d can be located at any desired point on the circumference of the gear B', and any number of these pins can be located on the circumference of the gear B'.

E is the operating sheave mounted loosely on the drum shaft and connected with the car by any desired means.

In the drawings, E is the operating sheave carrying the cables c, which extend through the car.

F is the operating bar, which is connected with the source of power, said bar F being connected to the operating sheave by link f. To the end of this link is connected the lever G attached to shaft g. To the opposite end of this shaft is secured a forked lever H,-which is in such position (see Fig. 2) that one prong h passes on one side of the gear B' and the other prong h' on the other side of the gear B.

The operation is as follows: Take, for instance,'when the elevator is descending and the operating bar moved to the right, the lever beingy in the upper of the two positions shown in dotted lines Fig. l, the prong h on the lever H being raised so as to be in line with the center of gear B. A forging D with pind is placed on the gear B' in such position that it will strikethe prong h when the elevator has descended the desired distance. When the pin d strikes the prong h, it lowers said prong and lever H to the lower of the two positions indicated in Fig. 1, which rocks the shaft g, moving the lever G and through it the bar F to the left, stopping the mechanism. The prong h and pin d are so adjusted that when the pin d has pushed the prong h downward so as to move the bar F a distance sufficient to shut off the power, said 'pin is in a position to pass beyond said prong, thereby preventing the movement of the bar so as to reverse the movement of the elevator. To ascend, the operating bar is thrown to the left and the forked lever depressed so that when the gear B has revolved the desired distance a pin d placed on its circumference will strike the upper prong and move it up to the lower of the two positions indicated and thus bring the operating bar to the center and stop the mechanism. These pins d can be placed at any desired points on the gear B', so that the elevator can bestopped ICO in the direction it wasmoved, but, the bar F can be operated in the oppositey direction to reverse the elevator. automatically stopped at intermediate points andanitomatically stopped and locked at the ends-of its travel. i i

Having now fully described my..invention,i

whatl claim, and desire to protect by Letters Patent, is i In an, elevating appareil-9S" in -ombiuationya lifting cable, ydrum,` a gear llwheel, .connection between said gear wheelandthedaju-m adaptedtorevolve said `gearwheel, stepsat fixedpoints 0.11 the circumferenceef saLdgear,

power controlling mechanism, and intermedie` ate` connectionl with, ,the power controlling mechanism and adapted to be engaged by Sa'id'stops f L 'r it ,i2i.,In an` elevating apparatus, in. co mbina tion, ailfting cable:drum,a gear vvheeLeon nection bet-weensaid gearwheel and .tbedwm adaptedito revolvesaid geen wheel, Said naar wheel being provided with; a slot, stopsadapt-1 editobevsecured in saidfsltpewer @eut-rot ling mecha,nism,-aud intermediat'e'connection with ,the power controlling mechanism and adapted to be engaged. by said stopA i ,l

3. In all elevating apparatns,in cQmbi-nations-'a Lifting, cable `drum,aerea? Wheel, een. nsetionrbetiween said gear wbeelandth edrum,l adapted ,to revolve said gearwheel, stopsfon said gear, an operatingfbar, a shaft, connection between .the V,operating bar andsaid shaft, and

a lever secured to Asaid shaft Vand. provided-` With a iforked.`A end, one fork, resting oneach side of said gear and adapted to be engaged by stops on saidgea-r., f ,A -v

:4. In an elevating yapparatus,1in. combina* tionfalifting cable drum, a gearwheeh conf.

nection between saidgearwheeland the drum, adapted to revolve said gear wheel, said gear wheelbeing provided with aslo t,st ops adapt-,y ed` to-be ,securedin said slot, an .operating bar,a shaft,a lever on said shaft, connection Thus theelevator lis,

between the operating bar and said lever, and a lever secured to said shaft and provided with a forked end, one fork resting on each side of said gear and adapted to be engaged by the stops on said gear.

5. In an elevating apparatus, in combination, a lifting cable drum, a gear wheel on the shaft of said drum, a secondary gear adapted to be revolved by the drum shaft gear, stops on said secondary gear, power controlling mechanism, and connection with the power controlling mechanism and adapted to be en- ,gagedbysaidi stops,

6. In an elevating apparatus, in combination, a lifting @able @runt agear wheel 01.1 .the Shaft oi'isaid drum, asecondary gearzadapted t0, berevolvedbv the drinn` sbaftigenseid Secondary*gear.wheeLheing-.Drvvided with, a Slot, stopsedanted--teibeeured-i-naid slof, powercontrbllingmechanisnzxz and intermedi- 'ateconnection .withthe power cgntrolling mechanism and adapted to be engaged by Said 1U," i if, w fi;

In en 1 eleratina arrerawaiu i @Ombnation, a lifting: cable .drnmmgearwheel on the shaft. of saiddrumra: geanand ccmneetion betweenfthe gear wheel onthe drum Ashaftand Said earfedapted t0. revelve Saidgeanau 0perating bar, a. shaft,a lever on saidgsbaft, connection between the operatingbar and isaid lever, and a lever secnred, to said. shaft and provided .with a-forkedend, one forkresting on each .side of..said gear andadapted, to be moved te operate the pewer ,aontrollingmechf nanismat certain points in the revolution of 8. In an elevatingapparatus,in combina.

ytierna lifting cable drum-,a gear wheel .on the shaft offsaiddrnm, a secondary gearadapted to be revolvediby the drum shaft gear,'said vseeondanv gear whcelloeing provided with `a slot, stops adaptedto besecnred in saidslot, an

operating bar, [a shaft `a lever on, said shaft, `con nection between theoperatingbarand said lever, and a lever,` securedto said `shaft and provided with a forked end,ione,f orkl resting onieach side of said gear ,and adapted to be moved in'llinewithsaidgear. In `testimony of ,which invention hereunto set my hand. .v l.

FRANK E. HRDMAN.

I have Witnesses:

W. v. Mantra, JOSEPH COOK.

ICO 

